ninety Meaning, Definition & Usage

  1. noun the cardinal number that is the product of ten and nine
    90; XC.
  2. adjective satellite being ten more than eighty
    90; xc.

WordNet

Nine"ty adjective
Etymology
See Nine, and cf. Forty.
Definitions
  1. Nine times ten; eighty-nine and one more; as, ninety men.
Nine"ty noun
Wordforms
plural Nineties
Definitions
  1. The sum of nine times ten; the number greater by a unit than eighty-nine; ninety units or objects.
  2. A symbol representing ninety units, as 90 or xc.

Webster 1913